Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 17720233A 25MM AH IT9 found under Packing Preformed by Seffle Marine Ltd. The National Stock Number assigned to this part is 5330014262141, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 17720233A 25MM AH IT9.